HibernateUtil.java

package org.infoglue.common.util;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil {

    private static Log log = LogFactory.getLog(HibernateUtil.class);

    private static final SessionFactory sessionFactory;

    static 
    {
        try 
        {
            // Create the SessionFactory
            sessionFactory = new Configuration().configure().buildSessionFactory();
        } 
        catch (Throwable ex) 
        {
            // Make sure you log the exception, as it might be swallowed
            log.error("Initial SessionFactory creation failed.", ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static final ThreadLocal session = new ThreadLocal();

    public static Session currentSession() 
    {
        Session s = (Session) session.get();
        // Open a new Session, if this Thread has none yet
        if (s == null) 
        {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() 
    {
        Session s = (Session) session.get();
        if (s != null)
            s.close();
        
        session.set(null);
    }
}